Book  (Jan 2000)  Page(s) 226.  
 
Caroline of Italy Tree Peony. Origin unknown pre-1846... red

Article (magazine)  (Jan 1955)  Page(s) 13.  
 
As the century drew to a close, the references became fewer and fewer. When the old growers died, the desire for large collections of Chinese tree peonies apparently died with thep:l. The varieties they had grown with the possible exception of P. papaveracea had full double flowers. They were so heavy that the stems could not properly support them, with the result that many of the flowers were hidden under the foliage. In addition to the varieties already mentioned, there were being grown under European names, one white, 'Lambertinae'; a few very beautiful salmon pinks and rose pinks such as 'Carolina d'Italie,' 'Comte de Rambuteau,' 'Jeanne d'Arc,' 'Marquis de Clapiers,' 'Mme. Stuart Low,' and 'Mme. Victor Gillier'; a gorgeous rose red or cherry red, 'Reine Elizabeth'; and a fine deep purple, 'Souv. de Ducher.' 

Article (magazine)  (Jan 1955)  Page(s) 56.  
 
Alphabetical Check List of Tree Peony Names In  Public Collections And/or Available in Nurseries 1954-1955
Chinese, Pink, 'Carolina d'Italie' (Italy or China bef. 1846), [Gardens] Scott Foundation, Whitnal Park Botanical Gardens, [Nurseries] Oberlin Peony Gardens

Website/Catalog  (1941)  Page(s) [3].  
 
Tree Peonies
Carolina d'Italie. Loosely built; large; double; beautiful flesh-pink...$6 00

Website/Catalog  (1940)  Page(s) 5.  
 
European Tree Peonies
8. Carolina d'Italie. Large; double; loosely built; beautiful flesh-pink...$6.00

Book  (1917)  Page(s) 112.  
 
Caroline d'Italie, which has finely formed flowers of silvery flesh colour, with a reflex of salmon.

Website/Catalog  (1906)  Page(s) 37.  
 
Paeonia arborea. Tree-Peonies. A selection of especially fine double sorts.
Caroline d'Italie, soft salmon-coloured with cream, ruffled, densely filled medium sized cup form.

Website/Catalog  (1903)  Page(s) 26.  
 
Pæonia Arborea (Tree Peonies)
The Tree Peony is really one of the finest plants available for the garden or the conservatory; it is quite hardy and does well under the simplest treatment. The smallest one will flourish in the most astonishing manner, bearing blossoms from 6 to 8 inches across, which will increase every year in beauty and size. In colors, the flowers range in great variety, from a white to a nearly reddish black. [...]
Price: Two-year old, named varieties, purchaser's selection, $1.25 each, $12.00 per dozen...
Caroline d'Italie. Double, salmon flesh.

Book  (1898)  Page(s) 106.  
 
La Pivoine en arbre a fourni à la culture un grand nombre de variétés horticoles, les unes obtenues en Chine, et d'autres en Europe...Quant aux variétés horticoles, elles sont si nombreuses que nous ne pouvons citer que les plus remarquables.
Principales Variétés Horticoles
Carolina (Italie).—Très grande, pleine, carné tendre.

Website/Catalog  (1890)  Page(s) 32.  
 
Pæonia Arborea (Tree or Moutan Pæonies).
General Collection.
Caroline d'Italie, double, salmon flesh.